A 23-year-old Israeli man armed with a knife attempted to stab a Warsaw police officer outside a concert in the city on Thursday night, injuring the him. Police subdued the suspect at the scene and arrested him. The injured officer sustained moderate facial injuries. The concert by American band Allah-Las went on as planned.It remains unclear whether the attack was terror-related in nature, and what connection it may have had, if any, with the band.Last week in Rotterdam, Allah-Las cancelled a show due to a tip-off from Spanish police regarding a planned terrorist attack at the concert venue. While a man was detained by Dutch police and the planned attack thwarted, Polish police were on high alert for another possible attack. The band has said that some Muslims have stated that they find their band name offensive, though band members have denied any intention to offend or mock of Islam.